Figure 1

Effect of BPD and the duration of mechanical ventilation on the exhaled NO (top) and the NO production (bottom). The p-values show the extent of statistical significance of the covariates mean tidal expiratory flow (pMTEF), expiratory time (pTE), age (pAge) and body length (pBL); those of the main effects by mechanical ventilation (pMV) and BPD (pBPD); and that of the interaction (pAB) of both factors. Statistically significant values are shown in bold.